Modern and ancient geochemical constraints on Proterozoic atmosphere-ocean redox evolution

Dalton Shane Hardisty, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Tristan J Horner, Department of Marine Chemistry & Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, United States, Scott D Wankel, Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, United States, Zunli Lu, Syracuse University, Department of Earth and Environmental Sciences, Syracuse, NY, United States, Timothy Lyons, University of California Riverside, Department of Earth and Planetary Sciences, Riverside, United States and Sune Nielsen, Woods Hole Oceanographic Institution, Geology & Geophysics, Woods Hole, United States